LM8333 - Keypad Controller

Product Overview

National Semiconductor

Datasheet Details

Part number	LM8333
Manufacturer	National Semiconductor
File Size	946.73 KB
Description	Keypad Controller
Datasheet	LM8333 Datasheet
Additional preview pages of the LM8333 datasheet.

Product details

Description

The LM8333 is a general-purpose controller for matrixaddressed keypads which provides an ACCESS.bus (I2Ccompatible) interface to a host microcontroller.

It offloads the burden of keyboard scanning from the host, while providing extremely low power consumption in both operational and standby modes.

Features

n 8 x 8 standard keys n 8 special function keys (SF keys) providing a total of 72 keys for the maximum keyboard matrix n ACCESS. bus (I2C-compatible) communication interface to the host n Four general purpose host programmable I/O pins with two optional (slow) external Interrupts n 16 byte FIFO buffer to store key pressed and key released events n Error control with error reports on (FIFO overrun, Keypad overrun, invalid command) n Host programmable PWM n Host programmable active time and debounc.

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Published: Nov 12, 2006 |